="movie" value="http://s2.tankionline.com/tankiref.swf"></param><param name="flashvars" value="hash=7ca1d3a22&server=s2.tankionline.com" /><embed src="http://s2.tankionline.com/tankiref.swf" type="application/x-shockwave-flash" width="468" height="120" flashvars="hash=7ca1d3a22&server=s2.tankionline.com"></embed></object>

I experience the "invisible tank" bug fairly often. I also have the same kind of lag, but I use Safari on a mac.